212440673 has 16 divisors (see below), whose sum is σ = 226195200. Its totient is φ = 199108800.

The previous prime is 212440661. The next prime is 212440783. The reversal of 212440673 is 376044212.

It is a cyclic number.

It is not a de Polignac number, because 212440673 - 2⁶ = 212440609 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (212440603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252788 + ... + 253626.

It is an arithmetic number, because the mean of its divisors is an integer number (14137200).

Almost surely, 2^212440673 is an apocalyptic number.

212440673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

212440673 is a deficient number, since it is larger than the sum of its proper divisors (13754527).

212440673 is a wasteful number, since it uses less digits than its factorization.

212440673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 212440673 is about 14575.3446957525. The cubic root of 212440673 is about 596.6860568518.

Adding to 212440673 its reverse (376044212), we get a palindrome (588484885).

The spelling of 212440673 in words is "two hundred twelve million, four hundred forty thousand, six hundred seventy-three".